linux-kernel - Re: [PATCH v4 3/6] dt-bindings: remoteproc: Add common TI SCI rproc bindings

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Message-ID: <647642d5-5021-363f-c9c9-3714a826436c@ti.com>
Date:   Tue, 21 Jul 2020 11:40:33 -0500
From:   Suman Anna <s-anna@...com>
To:     Rob Herring <robh+dt@...nel.org>, Lokesh Vutla <lokeshvutla@...com>
CC:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        "open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM" 
        <linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 3/6] dt-bindings: remoteproc: Add common TI SCI rproc
 bindings

Hi Rob,

On 7/21/20 10:53 AM, Rob Herring wrote:
> On Fri, Jul 17, 2020 at 5:48 PM Suman Anna <s-anna@...com> wrote:
>>
>> Add a bindings document that lists the common TI SCI properties
>> used by the K3 R5F and DSP remoteproc devices.
>>
>> Signed-off-by: Suman Anna <s-anna@...com>
>> ---
>> v4: Addressed both of Rob's review comments on ti,sci-proc-ids property
>> v3: https://patchwork.kernel.org/patch/11602317/
>>
>>   .../bindings/remoteproc/ti,k3-sci-proc.yaml   | 48 +++++++++++++++++++
>>   1 file changed, 48 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/remoteproc/ti,k3-sci-proc.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/remoteproc/ti,k3-sci-proc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,k3-sci-proc.yaml
>> new file mode 100644
>> index 000000000000..0dca2ffdbc48
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/remoteproc/ti,k3-sci-proc.yaml
>> @@ -0,0 +1,48 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/remoteproc/ti,k3-sci-proc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Common TI K3 remote processor device bindings
>> +
>> +maintainers:
>> +  - Suman Anna <s-anna@...com>
>> +
>> +description: |
>> +  The TI K3 family of SoCs usually have one or more remote processor sub-systems
>> +  like the dual-core R5F sub-system or a C66x or C71x DSP processor subsystem.
>> +  The device management of these remote processors is managed by a dedicated
>> +  System Processor, and the communication with that processor is managed through
>> +  the TI-SCI protocol.
>> +
>> +  Each remote processor device node should define a common set of properties
>> +  that allows the System Processor firmware to perform the device management
>> +  such as powering the IPs, asserting/deasserting the resets for each of these
>> +  processors.
>> +
>> +properties:
>> +  ti,sci:
>> +    $ref: /schemas/types.yaml#/definitions/phandle
>> +    description:
>> +      Should be a phandle to the TI-SCI System Controller node
>> +
>> +  ti,sci-dev-id:
>> +    $ref: /schemas/types.yaml#/definitions/uint32
>> +    description: |
>> +      Should contain the TI-SCI device id corresponding to the remote processor
>> +      core. Please refer to the corresponding System Controller documentation
>> +      for valid values.
> 
> These also apply on Lokesh's series converting ti,sci-int[ra]
> bindings. Please rework to use for both.

OK.

> 
>> +
>> +  ti,sci-proc-ids:
>> +    description: Should contain a single tuple of <proc_id host_id>.
>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>> +    items:
>> +      - description: TI-SCI processor id for the remote processor device
>> +      - description: TI-SCI host id to which processor control ownership
>> +                     should be transferred to

This property is not required for the ti,sci-int[ra].

I can plan to move this to a common location like 
Documentation/devicetree/bindings/arm/keystone/ and let the individual 
bindings define the required properties. Does that sound ok to you?

regards
Suman

>> +
>> +required:
>> +  - ti,sci
>> +  - ti,sci-dev-id
>> +  - ti,sci-proc-ids
>> --
>> 2.26.0
>>